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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013, 2014 Damien P. George
* Copyright (c) 2014-2017 Paul Sokolovsky
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <stdint.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include <unistd.h>
#include <ctype.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <errno.h>
#include <signal.h>
#include "py/compile.h"
#include "py/runtime.h"
#include "py/builtin.h"
#include "py/repl.h"
#include "py/gc.h"
#include "py/objstr.h"
#include "py/stackctrl.h"
#include "py/mphal.h"
#include "py/mpthread.h"
#include "extmod/misc.h"
#include "extmod/modplatform.h"
#include "extmod/vfs.h"
#include "extmod/vfs_posix.h"
#include "genhdr/mpversion.h"
#include "input.h"
#if defined(MICROPY_UNIX_COVERAGE) // CIRCUITPY-CHANGE
#include "py/objstr.h"
typedef int os_getenv_err_t;
mp_obj_t common_hal_os_getenv(const char *key, mp_obj_t default_);
os_getenv_err_t common_hal_os_getenv_str(const char *key, char *value, size_t value_len);
os_getenv_err_t common_hal_os_getenv_int(const char *key, mp_int_t *value);
STATIC mp_obj_t mod_os_getenv_int(mp_obj_t var_in) {
mp_int_t value;
os_getenv_err_t result = common_hal_os_getenv_int(mp_obj_str_get_str(var_in), &value);
if (result == 0) {
return mp_obj_new_int(value);
}
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_1(mod_os_getenv_int_obj, mod_os_getenv_int);
STATIC mp_obj_t mod_os_getenv_str(mp_obj_t var_in) {
char buf[4096];
os_getenv_err_t result = common_hal_os_getenv_str(mp_obj_str_get_str(var_in), buf, sizeof(buf));
if (result == 0) {
return mp_obj_new_str_copy(&mp_type_str, (byte *)buf, strlen(buf));
}
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_1(mod_os_getenv_str_obj, mod_os_getenv_str);
#endif
// Command line options, with their defaults
STATIC bool compile_only = false;
STATIC uint emit_opt = MP_EMIT_OPT_NONE;
#if MICROPY_ENABLE_GC
// Heap size of GC heap (if enabled)
// Make it larger on a 64 bit machine, because pointers are larger.
long heap_size = 1024 * 1024 * (sizeof(mp_uint_t) / 4);
#endif
// Number of heaps to assign by default if MICROPY_GC_SPLIT_HEAP=1
#ifndef MICROPY_GC_SPLIT_HEAP_N_HEAPS
#define MICROPY_GC_SPLIT_HEAP_N_HEAPS (1)
#endif
#if !MICROPY_PY_SYS_PATH
#error "The unix port requires MICROPY_PY_SYS_PATH=1"
#endif
#if !MICROPY_PY_SYS_ARGV
#error "The unix port requires MICROPY_PY_SYS_ARGV=1"
#endif
STATIC void stderr_print_strn(void *env, const char *str, size_t len) {
(void)env;
ssize_t ret;
MP_HAL_RETRY_SYSCALL(ret, write(STDERR_FILENO, str, len), {});
#if MICROPY_PY_OS_DUPTERM
mp_os_dupterm_tx_strn(str, len);
#endif
}
const mp_print_t mp_stderr_print = {NULL, stderr_print_strn};
#define FORCED_EXIT (0x100)
// If exc is SystemExit, return value where FORCED_EXIT bit set,
// and lower 8 bits are SystemExit value. For all other exceptions,
// return 1.
STATIC int handle_uncaught_exception(mp_obj_base_t *exc) {
// check for SystemExit
if (mp_obj_is_subclass_fast(MP_OBJ_FROM_PTR(exc->type), MP_OBJ_FROM_PTR(&mp_type_SystemExit))) {
// None is an exit value of 0; an int is its value; anything else is 1
mp_obj_t exit_val = mp_obj_exception_get_value(MP_OBJ_FROM_PTR(exc));
mp_int_t val = 0;
if (exit_val != mp_const_none && !mp_obj_get_int_maybe(exit_val, &val)) {
val = 1;
}
return FORCED_EXIT | (val & 255);
}
// Report all other exceptions
mp_obj_print_exception(&mp_stderr_print, MP_OBJ_FROM_PTR(exc));
return 1;
}
#define LEX_SRC_STR (1)
#define LEX_SRC_VSTR (2)
#define LEX_SRC_FILENAME (3)
#define LEX_SRC_STDIN (4)
// Returns standard error codes: 0 for success, 1 for all other errors,
// except if FORCED_EXIT bit is set then script raised SystemExit and the
// value of the exit is in the lower 8 bits of the return value
STATIC int execute_from_lexer(int source_kind, const void *source, mp_parse_input_kind_t input_kind, bool is_repl) {
mp_hal_set_interrupt_char(CHAR_CTRL_C);
nlr_buf_t nlr;
if (nlr_push(&nlr) == 0) {
// create lexer based on source kind
mp_lexer_t *lex;
if (source_kind == LEX_SRC_STR) {
const char *line = source;
lex = mp_lexer_new_from_str_len(MP_QSTR__lt_stdin_gt_, line, strlen(line), false);
} else if (source_kind == LEX_SRC_VSTR) {
const vstr_t *vstr = source;
lex = mp_lexer_new_from_str_len(MP_QSTR__lt_stdin_gt_, vstr->buf, vstr->len, false);
} else if (source_kind == LEX_SRC_FILENAME) {
lex = mp_lexer_new_from_file((const char *)source);
} else { // LEX_SRC_STDIN
lex = mp_lexer_new_from_fd(MP_QSTR__lt_stdin_gt_, 0, false);
}
qstr source_name = lex->source_name;
#if MICROPY_PY___FILE__
if (input_kind == MP_PARSE_FILE_INPUT) {
mp_store_global(MP_QSTR___file__, MP_OBJ_NEW_QSTR(source_name));
}
#endif
mp_parse_tree_t parse_tree = mp_parse(lex, input_kind);
#if defined(MICROPY_UNIX_COVERAGE)
// allow to print the parse tree in the coverage build
if (mp_verbose_flag >= 3) {
printf("----------------\n");
mp_parse_node_print(&mp_plat_print, parse_tree.root, 0);
printf("----------------\n");
}
#endif
mp_obj_t module_fun = mp_compile(&parse_tree, source_name, is_repl);
if (!compile_only) {
// execute it
mp_call_function_0(module_fun);
}
mp_hal_set_interrupt_char(-1);
mp_handle_pending(true);
nlr_pop();
return 0;
} else {
// uncaught exception
mp_hal_set_interrupt_char(-1);
mp_handle_pending(false);
return handle_uncaught_exception(nlr.ret_val);
}
}
#if MICROPY_USE_READLINE == 1
#include "shared/readline/readline.h"
#else
STATIC char *strjoin(const char *s1, int sep_char, const char *s2) {
int l1 = strlen(s1);
int l2 = strlen(s2);
char *s = malloc(l1 + l2 + 2);
memcpy(s, s1, l1);
if (sep_char != 0) {
s[l1] = sep_char;
l1 += 1;
}
memcpy(s + l1, s2, l2);
s[l1 + l2] = 0;
return s;
}
#endif
STATIC int do_repl(void) {
mp_hal_stdout_tx_str(MICROPY_BANNER_NAME_AND_VERSION);
mp_hal_stdout_tx_str("; " MICROPY_BANNER_MACHINE);
mp_hal_stdout_tx_str("\nUse Ctrl-D to exit, Ctrl-E for paste mode\n");
#if MICROPY_USE_READLINE == 1
// use MicroPython supplied readline
vstr_t line;
vstr_init(&line, 16);
for (;;) {
mp_hal_stdio_mode_raw();
input_restart:
vstr_reset(&line);
int ret = readline(&line, mp_repl_get_ps1());
mp_parse_input_kind_t parse_input_kind = MP_PARSE_SINGLE_INPUT;
if (ret == CHAR_CTRL_C) {
// cancel input
mp_hal_stdout_tx_str("\r\n");
goto input_restart;
} else if (ret == CHAR_CTRL_D) {
// EOF
printf("\n");
mp_hal_stdio_mode_orig();
vstr_clear(&line);
return 0;
} else if (ret == CHAR_CTRL_E) {
// paste mode
mp_hal_stdout_tx_str("\npaste mode; Ctrl-C to cancel, Ctrl-D to finish\n=== ");
vstr_reset(&line);
for (;;) {
char c = mp_hal_stdin_rx_chr();
if (c == CHAR_CTRL_C) {
// cancel everything
mp_hal_stdout_tx_str("\n");
goto input_restart;
} else if (c == CHAR_CTRL_D) {
// end of input
mp_hal_stdout_tx_str("\n");
break;
} else {
// add char to buffer and echo
vstr_add_byte(&line, c);
if (c == '\r') {
mp_hal_stdout_tx_str("\n=== ");
} else {
mp_hal_stdout_tx_strn(&c, 1);
}
}
}
parse_input_kind = MP_PARSE_FILE_INPUT;
} else if (line.len == 0) {
if (ret != 0) {
printf("\n");
}
goto input_restart;
} else {
// got a line with non-zero length, see if it needs continuing
while (mp_repl_continue_with_input(vstr_null_terminated_str(&line))) {
vstr_add_byte(&line, '\n');
ret = readline(&line, mp_repl_get_ps2());
if (ret == CHAR_CTRL_C) {
// cancel everything
printf("\n");
goto input_restart;
} else if (ret == CHAR_CTRL_D) {
// stop entering compound statement
break;
}
}
}
mp_hal_stdio_mode_orig();
ret = execute_from_lexer(LEX_SRC_VSTR, &line, parse_input_kind, true);
if (ret & FORCED_EXIT) {
return ret;
}
}
#else
// use simple readline
for (;;) {
char *line = prompt((char *)mp_repl_get_ps1());
if (line == NULL) {
// EOF
return 0;
}
while (mp_repl_continue_with_input(line)) {
char *line2 = prompt((char *)mp_repl_get_ps2());
if (line2 == NULL) {
break;
}
char *line3 = strjoin(line, '\n', line2);
free(line);
free(line2);
line = line3;
}
int ret = execute_from_lexer(LEX_SRC_STR, line, MP_PARSE_SINGLE_INPUT, true);
if (ret & FORCED_EXIT) {
return ret;
}
free(line);
}
#endif
}
STATIC int do_file(const char *file) {
return execute_from_lexer(LEX_SRC_FILENAME, file, MP_PARSE_FILE_INPUT, false);
}
STATIC int do_str(const char *str) {
return execute_from_lexer(LEX_SRC_STR, str, MP_PARSE_FILE_INPUT, false);
}
STATIC void print_help(char **argv) {
printf(
"usage: %s [<opts>] [-X <implopt>] [-c <command> | -m <module> | <filename>]\n"
"Options:\n"
"-h : print this help message\n"
"-i : enable inspection via REPL after running command/module/file\n"
#if MICROPY_DEBUG_PRINTERS
"-v : verbose (trace various operations); can be multiple\n"
#endif
"-O[N] : apply bytecode optimizations of level N\n"
"\n"
"Implementation specific options (-X):\n", argv[0]
);
int impl_opts_cnt = 0;
printf(
" compile-only -- parse and compile only\n"
#if MICROPY_EMIT_NATIVE
" emit={bytecode,native,viper} -- set the default code emitter\n"
#else
" emit=bytecode -- set the default code emitter\n"
#endif
);
impl_opts_cnt++;
#if MICROPY_ENABLE_GC
printf(
" heapsize=<n>[w][K|M] -- set the heap size for the GC (default %ld)\n"
, heap_size);
impl_opts_cnt++;
#endif
#if defined(__APPLE__)
printf(" realtime -- set thread priority to realtime\n");
impl_opts_cnt++;
#endif
if (impl_opts_cnt == 0) {
printf(" (none)\n");
}
}
STATIC int invalid_args(void) {
fprintf(stderr, "Invalid command line arguments. Use -h option for help.\n");
return 1;
}
// Process options which set interpreter init options
STATIC void pre_process_options(int argc, char **argv) {
for (int a = 1; a < argc; a++) {
if (argv[a][0] == '-') {
if (strcmp(argv[a], "-c") == 0 || strcmp(argv[a], "-m") == 0) {
break; // Everything after this is a command/module and arguments for it
}
if (strcmp(argv[a], "-h") == 0) {
print_help(argv);
exit(0);
}
if (strcmp(argv[a], "-X") == 0) {
if (a + 1 >= argc) {
exit(invalid_args());
}
if (0) {
} else if (strcmp(argv[a + 1], "compile-only") == 0) {
compile_only = true;
} else if (strcmp(argv[a + 1], "emit=bytecode") == 0) {
emit_opt = MP_EMIT_OPT_BYTECODE;
#if MICROPY_EMIT_NATIVE
} else if (strcmp(argv[a + 1], "emit=native") == 0) {
emit_opt = MP_EMIT_OPT_NATIVE_PYTHON;
} else if (strcmp(argv[a + 1], "emit=viper") == 0) {
emit_opt = MP_EMIT_OPT_VIPER;
#endif
#if MICROPY_ENABLE_GC
} else if (strncmp(argv[a + 1], "heapsize=", sizeof("heapsize=") - 1) == 0) {
char *end;
heap_size = strtol(argv[a + 1] + sizeof("heapsize=") - 1, &end, 0);
// Don't bring unneeded libc dependencies like tolower()
// If there's 'w' immediately after number, adjust it for
// target word size. Note that it should be *before* size
// suffix like K or M, to avoid confusion with kilowords,
// etc. the size is still in bytes, just can be adjusted
// for word size (taking 32bit as baseline).
bool word_adjust = false;
if ((*end | 0x20) == 'w') {
word_adjust = true;
end++;
}
if ((*end | 0x20) == 'k') {
heap_size *= 1024;
} else if ((*end | 0x20) == 'm') {
heap_size *= 1024 * 1024;
} else {
// Compensate for ++ below
--end;
}
if (*++end != 0) {
goto invalid_arg;
}
if (word_adjust) {
heap_size = heap_size * MP_BYTES_PER_OBJ_WORD / 4;
}
// If requested size too small, we'll crash anyway
if (heap_size < 700) {
goto invalid_arg;
}
#endif
#if defined(__APPLE__)
} else if (strcmp(argv[a + 1], "realtime") == 0) {
#if MICROPY_PY_THREAD
mp_thread_is_realtime_enabled = true;
#endif
// main thread was already initialized before the option
// was parsed, so we have to enable realtime here.
mp_thread_set_realtime();
#endif
} else {
invalid_arg:
exit(invalid_args());
}
a++;
}
} else {
break; // Not an option but a file
}
}
}
STATIC void set_sys_argv(char *argv[], int argc, int start_arg) {
for (int i = start_arg; i < argc; i++) {
mp_obj_list_append(mp_sys_argv, MP_OBJ_NEW_QSTR(qstr_from_str(argv[i])));
}
}
#if MICROPY_PY_SYS_EXECUTABLE
extern mp_obj_str_t mp_sys_executable_obj;
STATIC char executable_path[MICROPY_ALLOC_PATH_MAX];
STATIC void sys_set_excecutable(char *argv0) {
if (realpath(argv0, executable_path)) {
mp_obj_str_set_data(&mp_sys_executable_obj, (byte *)executable_path, strlen(executable_path));
}
}
#endif
#ifdef _WIN32
#define PATHLIST_SEP_CHAR ';'
#else
#define PATHLIST_SEP_CHAR ':'
#endif
MP_NOINLINE int main_(int argc, char **argv);
int main(int argc, char **argv) {
#if MICROPY_PY_THREAD
mp_thread_init();
#endif
// We should capture stack top ASAP after start, and it should be
// captured guaranteedly before any other stack variables are allocated.
// For this, actual main (renamed main_) should not be inlined into
// this function. main_() itself may have other functions inlined (with
// their own stack variables), that's why we need this main/main_ split.
mp_stack_ctrl_init();
return main_(argc, argv);
}
MP_NOINLINE int main_(int argc, char **argv) {
#ifdef SIGPIPE
// Do not raise SIGPIPE, instead return EPIPE. Otherwise, e.g. writing
// to peer-closed socket will lead to sudden termination of MicroPython
// process. SIGPIPE is particularly nasty, because unix shell doesn't
// print anything for it, so the above looks like completely sudden and
// silent termination for unknown reason. Ignoring SIGPIPE is also what
// CPython does. Note that this may lead to problems using MicroPython
// scripts as pipe filters, but again, that's what CPython does. So,
// scripts which want to follow unix shell pipe semantics (where SIGPIPE
// means "pipe was requested to terminate, it's not an error"), should
// catch EPIPE themselves.
signal(SIGPIPE, SIG_IGN);
#endif
// Define a reasonable stack limit to detect stack overflow.
mp_uint_t stack_limit = 40000 * (sizeof(void *) / 4);
#if defined(__arm__) && !defined(__thumb2__)
// ARM (non-Thumb) architectures require more stack.
stack_limit *= 2;
#endif
mp_stack_set_limit(stack_limit);
pre_process_options(argc, argv);
#if MICROPY_ENABLE_GC
#if !MICROPY_GC_SPLIT_HEAP
char *heap = malloc(heap_size);
gc_init(heap, heap + heap_size);
#else
assert(MICROPY_GC_SPLIT_HEAP_N_HEAPS > 0);
char *heaps[MICROPY_GC_SPLIT_HEAP_N_HEAPS];
long multi_heap_size = heap_size / MICROPY_GC_SPLIT_HEAP_N_HEAPS;
for (size_t i = 0; i < MICROPY_GC_SPLIT_HEAP_N_HEAPS; i++) {
heaps[i] = malloc(multi_heap_size);
if (i == 0) {
gc_init(heaps[i], heaps[i] + multi_heap_size);
} else {
gc_add(heaps[i], heaps[i] + multi_heap_size);
}
}
#endif
#endif
#if MICROPY_ENABLE_PYSTACK
static mp_obj_t pystack[1024];
mp_pystack_init(pystack, &pystack[MP_ARRAY_SIZE(pystack)]);
#endif
mp_init();
#if MICROPY_EMIT_NATIVE
// Set default emitter options
MP_STATE_VM(default_emit_opt) = emit_opt;
#else
(void)emit_opt;
#endif
#if MICROPY_VFS_POSIX
{
// Mount the host FS at the root of our internal VFS
mp_obj_t args[2] = {
MP_OBJ_TYPE_GET_SLOT(&mp_type_vfs_posix, make_new)(&mp_type_vfs_posix, 0, 0, NULL),
MP_OBJ_NEW_QSTR(MP_QSTR__slash_),
};
mp_vfs_mount(2, args, (mp_map_t *)&mp_const_empty_map);
MP_STATE_VM(vfs_cur) = MP_STATE_VM(vfs_mount_table);
}
#endif
{
// sys.path starts as [""]
mp_sys_path = mp_obj_new_list(0, NULL);
mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR_));
// Add colon-separated entries from MICROPYPATH.
char *home = getenv("HOME");
char *path = getenv("MICROPYPATH");
if (path == NULL) {
path = MICROPY_PY_SYS_PATH_DEFAULT;
}
if (*path == PATHLIST_SEP_CHAR) {
// First entry is empty. We've already added an empty entry to sys.path, so skip it.
++path;
}
bool path_remaining = *path;
while (path_remaining) {
char *path_entry_end = strchr(path, PATHLIST_SEP_CHAR);
if (path_entry_end == NULL) {
path_entry_end = path + strlen(path);
path_remaining = false;
}
if (path[0] == '~' && path[1] == '/' && home != NULL) {
// Expand standalone ~ to $HOME
int home_l = strlen(home);
vstr_t vstr;
vstr_init(&vstr, home_l + (path_entry_end - path - 1) + 1);
vstr_add_strn(&vstr, home, home_l);
vstr_add_strn(&vstr, path + 1, path_entry_end - path - 1);
mp_obj_list_append(mp_sys_path, mp_obj_new_str_from_vstr(&vstr));
} else {
mp_obj_list_append(mp_sys_path, mp_obj_new_str_via_qstr(path, path_entry_end - path));
}
path = path_entry_end + 1;
}
}
mp_obj_list_init(MP_OBJ_TO_PTR(mp_sys_argv), 0);
#if defined(MICROPY_UNIX_COVERAGE)
{
MP_DECLARE_CONST_FUN_OBJ_0(extra_coverage_obj);
MP_DECLARE_CONST_FUN_OBJ_0(extra_cpp_coverage_obj);
mp_store_global(MP_QSTR_extra_coverage, MP_OBJ_FROM_PTR(&extra_coverage_obj));
mp_store_global(MP_QSTR_extra_cpp_coverage, MP_OBJ_FROM_PTR(&extra_cpp_coverage_obj));
// CIRCUITPY-CHANGE: test native base classes work as needed by CircuitPython libraries.
extern const mp_obj_type_t native_base_class_type;
mp_store_global(MP_QSTR_NativeBaseClass, MP_OBJ_FROM_PTR(&native_base_class_type));
mp_store_global(MP_QSTR_getenv_int, MP_OBJ_FROM_PTR(&mod_os_getenv_int_obj));
mp_store_global(MP_QSTR_getenv_str, MP_OBJ_FROM_PTR(&mod_os_getenv_str_obj));
}
#endif
// Here is some example code to create a class and instance of that class.
// First is the Python, then the C code.
//
// class TestClass:
// pass
// test_obj = TestClass()
// test_obj.attr = 42
//
// mp_obj_t test_class_type, test_class_instance;
// test_class_type = mp_obj_new_type(qstr_from_str("TestClass"), mp_const_empty_tuple, mp_obj_new_dict(0));
// mp_store_name(qstr_from_str("test_obj"), test_class_instance = mp_call_function_0(test_class_type));
// mp_store_attr(test_class_instance, qstr_from_str("attr"), mp_obj_new_int(42));
/*
printf("bytes:\n");
printf(" total %d\n", m_get_total_bytes_allocated());
printf(" cur %d\n", m_get_current_bytes_allocated());
printf(" peak %d\n", m_get_peak_bytes_allocated());
*/
#if MICROPY_PY_SYS_EXECUTABLE
sys_set_excecutable(argv[0]);
#endif
const int NOTHING_EXECUTED = -2;
int ret = NOTHING_EXECUTED;
bool inspect = false;
for (int a = 1; a < argc; a++) {
if (argv[a][0] == '-') {
if (strcmp(argv[a], "-i") == 0) {
inspect = true;
} else if (strcmp(argv[a], "-c") == 0) {
if (a + 1 >= argc) {
return invalid_args();
}
set_sys_argv(argv, a + 1, a); // The -c becomes first item of sys.argv, as in CPython
set_sys_argv(argv, argc, a + 2); // Then what comes after the command
ret = do_str(argv[a + 1]);
break;
} else if (strcmp(argv[a], "-m") == 0) {
if (a + 1 >= argc) {
return invalid_args();
}
mp_obj_t import_args[4];
import_args[0] = mp_obj_new_str(argv[a + 1], strlen(argv[a + 1]));
import_args[1] = import_args[2] = mp_const_none;
// Ask __import__ to handle imported module specially - set its __name__
// to __main__, and also return this leaf module, not top-level package
// containing it.
import_args[3] = mp_const_false;
// TODO: https://docs.python.org/3/using/cmdline.html#cmdoption-m :
// "the first element of sys.argv will be the full path to
// the module file (while the module file is being located,
// the first element will be set to "-m")."
set_sys_argv(argv, argc, a + 1);
mp_obj_t mod;
nlr_buf_t nlr;
// Allocating subpkg_tried on the stack can lead to compiler warnings about this
// variable being clobbered when nlr is implemented using setjmp/longjmp. Its
// value must be preserved across calls to setjmp/longjmp.
static bool subpkg_tried;
subpkg_tried = false;
reimport:
if (nlr_push(&nlr) == 0) {
mod = mp_builtin___import__(MP_ARRAY_SIZE(import_args), import_args);
nlr_pop();
} else {
// uncaught exception
return handle_uncaught_exception(nlr.ret_val) & 0xff;
}
// If this module is a package, see if it has a `__main__.py`.
mp_obj_t dest[2];
mp_load_method_protected(mod, MP_QSTR___path__, dest, true);
if (dest[0] != MP_OBJ_NULL && !subpkg_tried) {
subpkg_tried = true;
vstr_t vstr;
int len = strlen(argv[a + 1]);
vstr_init(&vstr, len + sizeof(".__main__"));
vstr_add_strn(&vstr, argv[a + 1], len);
vstr_add_strn(&vstr, ".__main__", sizeof(".__main__") - 1);
import_args[0] = mp_obj_new_str_from_vstr(&vstr);
goto reimport;
}
ret = 0;
break;
} else if (strcmp(argv[a], "-X") == 0) {
a += 1;
#if MICROPY_DEBUG_PRINTERS
} else if (strcmp(argv[a], "-v") == 0) {
mp_verbose_flag++;
#endif
} else if (strncmp(argv[a], "-O", 2) == 0) {
if (unichar_isdigit(argv[a][2])) {
MP_STATE_VM(mp_optimise_value) = argv[a][2] & 0xf;
} else {
MP_STATE_VM(mp_optimise_value) = 0;
for (char *p = argv[a] + 1; *p && *p == 'O'; p++, MP_STATE_VM(mp_optimise_value)++) {;
}
}
} else {
return invalid_args();
}
} else {
char *pathbuf = malloc(PATH_MAX);
char *basedir = realpath(argv[a], pathbuf);
if (basedir == NULL) {
mp_printf(&mp_stderr_print, "%s: can't open file '%s': [Errno %d] %s\n", argv[0], argv[a], errno, strerror(errno));
free(pathbuf);
// CPython exits with 2 in such case
ret = 2;
break;
}
// Set base dir of the script as first entry in sys.path.
char *p = strrchr(basedir, '/');
mp_obj_list_store(mp_sys_path, MP_OBJ_NEW_SMALL_INT(0), mp_obj_new_str_via_qstr(basedir, p - basedir));
free(pathbuf);
set_sys_argv(argv, argc, a);
ret = do_file(argv[a]);
break;
}
}
const char *inspect_env = getenv("MICROPYINSPECT");
if (inspect_env && inspect_env[0] != '\0') {
inspect = true;
}
if (ret == NOTHING_EXECUTED || inspect) {
if (isatty(0) || inspect) {
prompt_read_history();
ret = do_repl();
prompt_write_history();
} else {
ret = execute_from_lexer(LEX_SRC_STDIN, NULL, MP_PARSE_FILE_INPUT, false);
}
}
#if MICROPY_PY_SYS_SETTRACE
MP_STATE_THREAD(prof_trace_callback) = MP_OBJ_NULL;
#endif
#if MICROPY_PY_SYS_ATEXIT
// Beware, the sys.settrace callback should be disabled before running sys.atexit.
if (mp_obj_is_callable(MP_STATE_VM(sys_exitfunc))) {
mp_call_function_0(MP_STATE_VM(sys_exitfunc));
}
#endif
#if MICROPY_PY_MICROPYTHON_MEM_INFO
if (mp_verbose_flag) {
mp_micropython_mem_info(0, NULL);
}
#endif
#if MICROPY_PY_BLUETOOTH
void mp_bluetooth_deinit(void);
mp_bluetooth_deinit();
#endif
#if MICROPY_PY_THREAD
mp_thread_deinit();
#endif
#if defined(MICROPY_UNIX_COVERAGE)
gc_sweep_all();
#endif
mp_deinit();
#if MICROPY_ENABLE_GC && !defined(NDEBUG)
// We don't really need to free memory since we are about to exit the
// process, but doing so helps to find memory leaks.
#if !MICROPY_GC_SPLIT_HEAP
free(heap);
#else
for (size_t i = 0; i < MICROPY_GC_SPLIT_HEAP_N_HEAPS; i++) {
free(heaps[i]);
}
#endif
#endif
// printf("total bytes = %d\n", m_get_total_bytes_allocated());
return ret & 0xff;
}
void nlr_jump_fail(void *val) {
#if MICROPY_USE_READLINE == 1
mp_hal_stdio_mode_orig();
#endif
fprintf(stderr, "FATAL: uncaught NLR %p\n", val);
exit(1);
}
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